New aza heterocycles with benzimidazole, pyrazole and pyridine moieties in the same molecule have been prepared. Preliminary complexing properties with divalent copper salts were determined by means of mass spectrometry (FAB) and a very interesting oxydation reaction with molecular oxygen was shown.
✦ LIBER ✦
Gem dicyano époxydes équivalents synthétiques des dications cétènes : synthése de thiazolidinone-4 par réaction avec des thiourées substituées et évolution particulière en (aryl-cyanoformyl) méthylène-2 benzoxazole par réaction avec le thioxo-2 benzoxazole
✍ Scribed by A.Majcen Le Maréchal; A. Robert; I. Leban
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- French
- Weight
- 756 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0040-4020
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✦ Synopsis
The nucleophilic ring opening of gem dicyano epoxides by N-substituted or N-N' disubstituted thioureas leads to 2-imino 4-thiazolidinoncs, via postulated cyanoformyl intermediates, compounds 7 can exist in tautomeric equilibrium with a tautomeric 2-amino 4-hydroxy thiazolines. However, the cyanoformyl intermediates evolve differently when dicyano epoxides am reacted with 2thioxobenzoxazole, 2-(at-y1 cyanofotmyl) methylene txmzoxazoles.
R&urn& -L'ouverture nuclt-kphile des gem dicyano epoxydes par les thiourees N-subst.ituCes ou N-N
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B. El Azzaoui; J. Fifani; E.M. Tjiou; E.M. Essassi; J. Jaud; L. Lopez; J. Bellan
📂
Article
📅
1999
🏛
Elsevier Science
🌐
French
⚖ 317 KB